The invention discloses a cylinder hood inner cover plate assembly capable of lowering engine oil consumption. The cylinder hood inner cover plate assembly is provided with an oil return component, wherein the oil return component is composed of an oil return pipe; the oil return pipe is arranged on one end of the cylinder hood inner cover plate; the length of the oil return pipe is not less than 70mm; and except for the oil return pipe mounting region, the rest region on the cylinder hood inner cover plate is fully distributed with vent holes. By using the cylinder hood inner cover plate assembly, the exhaust in the crankcase can be discharged in time, thereby lowering the engine oil consumption.